Plasma densities, flow, and solar EUV flux at comet 67P - A cross-calibration approach F. L. Johansson, A. I. Eriksson, E. Vigren, L. Bucciantini, P. Henri, H. Nilsson, S. Bergman, N. J. T. Edberg, G. Stenberg Wieser and E. Odelstad A&A, 653 (2021) A128 Published online: 23 September 2021 DOI: 10.1051/0004-6361/202039959